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A permanent magnet in the shape of a thi...

A permanent magnet in the shape of a thin cylinder of length 10 cm has `M=10^(6)A//m`. Calculate the magnetisation current `I_(M)`.

A

`10^(5)A`

B

`10^(12)A`

C

`2xx10^(8)A`

D

`5xx10^(10)A`

Text Solution

Verified by Experts

The correct Answer is:
A
Given, M(intensity of magnetisation)`=10^(6)` A/m. ltbr. `1("length")=10cm=10xx10^( -2)m=0.1m`
and `I_(M)=` magnetesation current
we know that `M=(I_(M))/(l)`
`rArr I_(M)=Mxxl`
` =10^(6)xx0.1=10^(5)A`
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Knowledge Check

  • A permanent magnet in the shape of a thin cylinder of length 10 cm has magnetisation (M) = 10^(6)Am^(-1) . It's magnetization current I_(m) is

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